When Jack Was a Little Boy, He and His Father

When Jack was a little boy, he and his father used to build model airplanes together. When Jack grew up and went to college, got a job, and created a life of his own, he and his dad stopped building models together. Recently, however, Jack's father had to be placed in an elderly care facility. Jack goes to visit him once a week, and always brings along his son and a model airplane for them to build together. Jack bringing a model airplane to build with his father is an example of:

A) Inter-generational ritual
B) Assurance
C) Shared task
D) Couple time